Function introduction: 1. Plug in the power supply and the FND will display the word "OFF", and it is in a standby state (no heat) 2. Gear display: Fahrenheit 250 265 285 300 320 340 355 375 390 410 430 450 Celsius 120 130 140 150 160 170 180 190 200 210 220 230 3. Press and hold the switch for 2 seconds, the machine is turned on, the FND display gear is 355 degrees Fahrenheit (180C), the FND display gear starts to flash, and the machine starts to heat. After flashing three times, stop flashing, FND displays the real-time temperature value, until the temperature reaches the selected gear. 4. Use the "+" and "-" buttons to select different gears. 5. Press and hold the power button for 2 seconds to turn off the machine and the machine is in the standby state (FND displays the word "OFF") 6. If the button is not operated for 4S, it will be automatically locked, and the button will be invalid. At this time, when the button is pressed, the FND will instantly display the word "LOC", and the selected gear will be displayed when the button is released. 7. Press the "on/off key" twice within 1 second to unlock. 8. This machine has a memory function: in the case of not unplugging the power plug (standby state), when the machine is turned on again, the display gear is the gear when the heating was stopped last time. If the power plug is unplugged and re-inserted, the memory function will be invalid, and the heating display position is 355. 9. Press the "+" and "-" buttons at the same time, the FND display can switch between Fahrenheit and Celsius. 10. It will automatically shut down after 30 minutes of heating and be in standby mode. Display the word "OFF"